Showing Value to the Bottom Line

I thought you all might find this interesting. David Greenfield has an interesting post on his blog, Team Think, regarding Calculating the Value of Enterprise 2.0 Technologies. In it he mentions a Mark Shell, CIO of Freedom Federal Credit Union’s e-book, where he provides a formula to calculate it. I agree with David’s point, the difficulty in considering Enterprise 2.0’s impact to the bottom-line of a company is in productivity gained rather than simply cost savings. I’m curious if others out there have particular formulations they use either internally or with clients to demonstrate the value of Enterprise 2.0.